A modified carbon fiber containing ni-p-sic (titanium diboride) composite coating and its preparation and application

Abstract

The invention discloses a modified carbon fiber containing a Ni-P-SiC (titanium diboride) composite plating layer and a preparation method and application thereof. The modified carbon fiber consists of a carbon fiber and a Ni-P-SiC composite plating layer, a Ni-P-TiB2 composite plating layer or a Ni-P-SiC-TiB2 composite plating layer on the surface thereof. The preparation method comprises the following steps: the surface of the carbon fiber is put in chemical plating liquid for chemically plating the Ni-P-SiC, Ni-P-TiB2 or Ni-P-SiC-TiB2 composite layer to obtain the compact and uniform composite plating layer after pretreatment of degumming, roughening, neutralization, sensitization, activation, reduction and peptization; the bonding force of the composite plating layer and the carbon fiber is high; the compatibility of the modified carbon fiber and a metal matrix is excellent; the dispersibility in the metal matrix is excellent; a carbon fiber reinforced metal base composite material with good mechanical performance, stable performance and good reliability can be prepared; and the preparation method of the modified carbon fiber is simple and low in cost, and facilitates industrial production.

Description

technical field [0001] The invention relates to a modified carbon fiber and a preparation method thereof, in particular to a modified carbon fiber containing Ni-P-SiC and Ni-P-TiB 2 or Ni-P-SiC-TiB 2 The modified carbon fiber of the composite coating and the preparation method thereof belong to the technical field of preparation of modified carbon fiber materials. Background technique [0002] Carbon fiber has a series of excellent properties such as low density, high specific strength, high specific modulus, and high temperature resistance. One of its important applications is as a reinforcement for composite materials to carry loads. For example, carbon fiber can be combined with metal aluminum to prepare aluminum matrix composites with high modulus and high strength. Thermal oxidation leads to a decrease in mechanical properties. [0003] In response to these problems, researchers have proposed some methods to solve them. Among them, the more reported method is to app...

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Problems solved by technology

[0004] Aiming at the problems of short service life of carbon fiber at high temperature and poor wettability and dispersibility of carbon fiber and metal matrix in the prior art, the purpose of the present invention is to provide a compound with Ni-P-SiC, Ni-P- TiB 2 or Ni-P-SiC-TiB 2 Modified carbon fiber with composite coating, the composite coating of the modified carbon fiber is dense and uniform, and the composite coating has strong bonding force with carbon fiber, which can well improve the oxidation resistance, electrical conductivity and compatibility with the metal matrix of carbon fiber, and improve carbon fiber Dispersion properties in metal matrix

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